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  • Good Video Game User Interface Design Books/Websites?

    - by Tucker Morgan
    I having been programming games for some time, but while my teachers say that my code is good and advanced, my friends say that the interface is hard to understand and not the easiest to navigate. I want to learn how to design good user interfaces so that I can program better games, and people will have a easier time getting around. Does anyone know of any good books or websites about designing video game interfaces?

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  • Increase Google SERP Rank by Improving Your PageRank

    Having a good search engines results page (SERP) rank is the goal of SEO, this means higher organic traffic, more visitors and increased conversion rate. But how do we improve our SERP rank specially with Google who provides more than 70% of relevant search results? Well one of them is improving your website's PageRank, if you think SERP and PR are not related, keep on reading to find out.

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  • Fix Nautilus URIs in a Python script

    - by Pablo
    I have a very basic Python script I wrote mostly for learning purposes. It opens a terminal in the current folder. However, I can't get it to work in folders with accented characters in the URI (e.g.: /home/pablo/Vídeos or /home/pablo/Área de Trabalho), because it looks like Nautilus URIs are encoded to those %{number} values. Is there a way to convert these URIs to normalized URIs without having to translate every possible accented value by hand? Thanks in advance!

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  • Algorithm for approximating sihlouette image as polygon

    - by jack
    I want to be able to analyze a texture in real time and approximate a polygon to represent a silhouette. Imagine a person standing in front of a green screen and I want to approximately trace around their outline and get a 2D polygon as the result. Are there algorithms to do this and are they fast enough to work frame-to-frame in a game? (I have found algorithms to triangulate polygons, but I am having trouble knowing what to search for that describes my goal.)

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  • Is Live Chat a valuable feature?

    - by Jim
    Does having a live chat feature on a website increase conversions enough to cover the cost administration? Most of the data I have found comes from companies selling live chat solutions and is unreliable in my opinion. Do users find this as a valuable feature or an annoyance? Personally, I'm annoyed by sites that use live chat especially when a little box pops up without my explicit request, but if users find this valuable then I should consider implementing it. Any concrete data is appreciated.

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  • How can I display eth0's IP address at the login screen on Precise Server?

    - by Andrew Stebenne
    The server I administrate, inconveniently enough, has a dynamic IP address assigned by DHCP. The convenient counterbalance, though, is that it happens to be set up about two feet from where I sit. I know how to edit /etc/issue to show different values before the login prompt is delivered to the display, but I'd like to know if it's possible for /etc/issue to display the current IP address of eth0 (re-evaluated at boot time) so that I can see it and then ssh in without having to log in to run ifconfig.

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  • Post SQLBits VI

    - by MartinBell
    It was funny waking up on a Saturday morning and SQLBits being over and not having to rush off to the venue. Don’t forget to fill in your feedback for the sessions at www.sqlbits.com/sessionfeedback and the whole conference at www.sqlbits.com/conferencefeedback , and get put into the draw for an Xbox. We’ve had lots of complements from lots of people and also some very positive tweets. It was great to see so many people stopping on for the social event at the end of the conference. In the final count...(read more)

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  • SQL University: What and why of database testing

    - by Mladen Prajdic
    This is a post for a great idea called SQL University started by Jorge Segarra also famously known as SqlChicken on Twitter. It’s a collection of blog posts on different database related topics contributed by several smart people all over the world. So this week is mine and we’ll be talking about database testing and refactoring. In 3 posts we’ll cover: SQLU part 1 - What and why of database testing SQLU part 2 - What and why of database refactoring SQLU part 2 – Tools of the trade With that out of the way let us sharpen our pencils and get going. Why test a database The sad state of the industry today is that there is very little emphasis on testing in general. Test driven development is still a small niche of the programming world while refactoring is even smaller. The cause of this is the inability of developers to convince themselves and their managers that writing tests is beneficial. At the moment they are mostly viewed as waste of time. This is because the average person (let’s not fool ourselves, we’re all average) is unable to think about lower future costs in relation to little more current work. It’s orders of magnitude easier to know about the current costs in relation to current amount of work. That’s why programmers convince themselves testing is a waste of time. However we have to ask ourselves what tests are really about? Maybe finding bugs? No, not really. If we introduce bugs, we’re likely to write test around those bugs too. But yes we can find some bugs with tests. The main point of tests is to have reproducible repeatability in our systems. By having a code base largely covered by tests we can know with better certainty what a small code change can break in other parts of the system. By having repeatability we can make code changes with confidence, since we know we’ll see what breaks in other tests. And here comes the inability to estimate future costs. By spending just a few more hours writing those tests we’d know instantly what broke where. Imagine we fix a reported bug. We check-in the code, deploy it and the users are happy. Until we get a call 2 weeks later about a certain monthly process has stopped working. What we don’t know is that this process was developed by a long gone coworker and for some reason it relied on that same bug we’ve happily fixed. There’s no way we could’ve known that. We say OK and go in and fix the monthly process. But what we have no clue about is that there’s this ETL job that relied on data from that monthly process. Now that we’ve fixed the process it’s giving unexpected (yet correct since we fixed it) data to the ETL job. So we have to fix that too. But there’s this part of the app we coded that relies on data from that exact ETL job. And just like that we enter the “Loop of maintenance horror”. With the loop eventually comes blame. Here’s a nice tip for all developers and DBAs out there: If you make a mistake man up and admit to it. All of the above is valid for any kind of software development. Keeping this in mind the database is nothing other than just a part of the application. But a big part! One reason why testing a database is even more important than testing an application is that one database is usually accessed from multiple applications and processes. This makes it the central and vital part of the enterprise software infrastructure. Knowing all this can we really afford not to have tests? What to test in a database Now that we’ve decided we’ll dive into this testing thing we have to ask ourselves what needs to be tested? The short answer is: everything. The long answer is: read on! There are 2 main ways of doing tests: Black box and White box testing. Black box testing means we have no idea how the system internals are built and we only have access to it’s inputs and outputs. With it we test that the internal changes to the system haven’t caused the input/output behavior of the system to change. The most important thing to test here are the edge conditions. It’s where most programs break. Having good edge condition tests we can be more confident that the systems changes won’t break. White box testing has the full knowledge of the system internals. With it we test the internal system changes, different states of the application, etc… White and Black box tests should be complementary to each other as they are very much interconnected. Testing database routines includes testing stored procedures, views, user defined functions and anything you use to access the data with. Database routines are your input/output interface to the database system. They count as black box testing. We test then for 2 things: Data and schema. When testing schema we only care about the columns and the data types they’re returning. After all the schema is the contract to the out side systems. If it changes we usually have to change the applications accessing it. One helpful T-SQL command when doing schema tests is SET FMTONLY ON. It tells the SQL Server to return only empty results sets. This speeds up tests because it doesn’t return any data to the client. After we’ve validated the schema we have to test the returned data. There no other way to do this but to have expected data known before the tests executes and comparing that data to the database routine output. Testing Authentication and Authorization helps us validate who has access to the SQL Server box (Authentication) and who has access to certain database objects (Authorization). For desktop applications and windows authentication this works well. But the biggest problem here are web apps. They usually connect to the database as a single user. Please ensure that that user is not SA or an account with admin privileges. That is just bad. Load testing ensures us that our database can handle peak loads. One often overlooked tool for load testing is Microsoft’s OSTRESS tool. It’s part of RML utilities (x86, x64) for SQL Server and can help determine if our database server can handle loads like 100 simultaneous users each doing 10 requests per second. SQL Profiler can also help us here by looking at why certain queries are slow and what to do to fix them.   One particular problem to think about is how to begin testing existing databases. First thing we have to do is to get to know those databases. We can’t test something when we don’t know how it works. To do this we have to talk to the users of the applications accessing the database, run SQL Profiler to see what queries are being run, use existing documentation to decipher all the object relationships, etc… The way to approach this is to choose one part of the database (say a logical grouping of tables that go together) and filter our traces accordingly. Once we’ve done that we move on to the next grouping and so on until we’ve covered the whole database. Then we move on to the next one. Database Testing is a topic that we can spent many hours discussing but let this be a nice intro to the world of database testing. See you in the next post.

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  • Trouble with Wubi and dual boot install

    - by noam
    Is there a difference between wubi install and doing an install of Ubuntu alongside windows7? I ask because I used wubi, but I'm having trouble with certain things like being unable to change my brightness settings and I'm wondering if installing from a usb drive would change anything. Also, I've tried to do a usb drive install, but it doesn't give me the option to install alongside, it only shows the "Replace Windows 7" and "something else" options. Is this because I already did a wubi install?

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  • Keywords - What Are Keywords?

    Starting your own internet business is far more than designing and creating a website to sell your products and/or services. Before you do anything you need to find out if people are buying your products online and more importantly how they will find your website to buy your products. Just having a website is only part of the story of making money online.

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  • 503.1 Service Unavailable Error Resolution

    - by Lee Brandt
    I was having a hell of a time tonight with my IIS on my development laptop. I don’t remember doing anything to change the IIS settings. I don’t use IIS that much on my dev machine. Usually Cassini is enough for testing my development efforts but tonight I needed to replicate a problem that seems to stem from x86 v x64 mismatch, so I went to create an IIS site pointed to my dev folder. When I did, I got a “503.1 Service Unavailable Error”. First thing I did is go over all my setting to make sure I didn’t screw something up when I set up the site. It was pointing to the right place, and the app pool settings seemed to be alright. However, when I got the 503.1 error and went back to my app pool list, I saw that the app pool I was using was stopped again. I must’ve started and ran it a dozen times to verify that I wasn’t seeing things. After having a colleague look at it and not finding an answer, I started poking around Google. I cam across a post from Phil Haack about the same error. His fix was not mine, however. When I ran his command on the CLI, I didn’t see the reserved routes for HTTP.SYS there. Finally, I looked in the event viewer (where I should have looked as soon as I saw that my app pool was stopping) and saw an error in there. For the IIS-W3SVC-WP Source I saw: The worker process for application pool 'DefaultAppPool' encountered an error 'Cannot read configuration file due to insufficient permissions ' trying to read configuration data from file '\\?\C:\Windows\Microsoft.NET\Framework64\v4.0.30319\CONFIG\machine.config', line number '0'. The data field contains the error code. So I went to that path and saw a little lock on the file icon. I opened up the security tab for file properties and saw that I was missing the IIS_IUSRS group. On a machine that was working correctly, I verified that it indeed had the IIS_IUSRS group set to Read and Read & Execute allowed. So I set mine up the same and voila! Hopefully this helps somebody else, too.

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  • PHP may be executing as a "privileged" group and user, which could be a serious security vulnerability

    - by Martin
    I ran some security tests on a Ubuntu 12.04 Server, and I've got these warnings : PHP may be executing as a "privileged" group, which could be a serious security vulnerability. PHP may be executing as a "privileged" user, which could be a serious security vulnerability. In /etc/apache2/envvars, I have this: export APACHE_RUN_USER=www-data export APACHE_RUN_GROUP=www-data And all files in /var/www are having these user/group: www-data:www-data Am I setting this correctly? What should I do to fix this problem?

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  • Simple Mouse Move Event in F# with Winforms

    - by MarkPearl
    This evening I had the pleasure of reading one of ThomasP’s blog posts on first class events. It was an excellent read, and I thought I would make a brief derivative of his post to explore some of the basics. In Thomas’s post he has a form with an ellipse on it that when he clicks on the ellipse it pops up a message box with the button clicked… awesome. Something that got me on the post though was the code similar to the one below… // React to Mouse Move events on the form let evtMessages = frm.MouseMove |> Event.map (fun mi -> mi.Location.ToString()) |> Event.map (sprintf "Hey, you clicked on the ellipse.\nUsing: %s") |> Event.add (MessageBox.Show >> ignore) The MessageBox is a function with a string passed into it. What if I wanted to rather change a mutable value holder instead, how would the syntax go for that? Immediately the thought came to me of anonymous functions. I’ve used them before to do something like this… let HelloPerson personName = "Hello " + personName |> fun(x) -> Console.WriteLine(x) So using the same approach I adapted the event code to instead of showing a Message Box with a string passed in to it, to rather change the forms header. |> Event.map (sprintf "Your mouse position is %s") |> Event.add(fun(x) -> frm.Text <- x) Okay… it looks a bit weird with the –> x <- syntax, but makes sense and works… The next thing I wanted to do was change Thomas’s code sample from having an ellipse, and reacting to the position of the mouse and click, to rather trigger the event whenever the mouse moved. This simple involved removing some filtering code. Finally I wanted the code to work as a FSharp Project without having to run through the F# interactive. To achieve this I just needed to find out how to trigger the window event loop. This can be achieved with the code below… // Program eventloop while frm.Created do Application.DoEvents()   So lets look at the complete code sample… #light open System open System.Drawing open System.Windows.Forms // Create the main form let frm = new Form(ClientSize=Size(600,400)) // React to Mouse Move events on the form let evtMessages = frm.MouseMove |> Event.map (fun mi -> mi.Location.ToString()) |> Event.map (sprintf "Your mouse position is %s") |> Event.add(fun(x) -> frm.Text <- x) // Show the form frm.Show() // Program eventloop while frm.Created do Application.DoEvents()

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  • Moving from building internal applications as WPF to ASP NET MVC?

    - by stuartmclark
    I have worked on quite a few internal applications for my work and I have always defaulted to using WPF, but I am considering re-writing existing ones into a web app. This is so that anyone in my company can use it without having to download anything from the network. I am just wondering if this is the way forward with any development of new internal applications? So, should I stop using WPF and start using ASP.NET MVC for internal applications that a lot of people need to use?

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  • .htaccess - lose the file .html extension

    - by Darren Sweeney
    I'm having a bad .htaccess day! I want a user to be able to type the URL mysite.com/about instead of mysite.com/about.html On .htaccess file I have: RewriteEngine On RewriteCond %{SCRIPT_FILENAME} !-f RewriteCond %{SCRIPT_FILENAME} !-d RewriteRule ^/(.*)$ /$1.html [NC,L] But this simply does not work? I will add though that if i try this further inside the site e.g. mysite.com/pages/contact Works perfectly whether I have the above code in the .htaccess or not What am I doing wrong?

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  • Interview with Koen Aben, Supply Chain Director of WE Fashion

    - by user801960
    We recently spoke to Koen Aben, the Supply Chain Director of WE Fashion, who gave us some insight into how Oracle supported the international fashion retailer through the completion of a large scale integration project across its 340 European stores. Koen explains the reasoning behind the project which was to create a common retail foundation and to integrate and align working processes to drive insight and enable continued growth. It is always good to hear from someone of Koen’s experience who can articulate the benefits of partnering with the right company for such an extensive project as this. Koen explains that a crucial element of such a project is to unify business applications into a common platform, adding that for successful growth, retailers really need to achieve enterprise-wide alignment. At the start of the three year project, WE Fashion’s application platform was fragmented impacting the company’s ability to support sustained growth. In light of this, WE Fashion invested in its processes, systems, teams and partnerships to build the needed retail foundation. Now after successfully completing the project, the basis is in place to ensure that growth is unimpeded. In the video, Koen Aben highlights some of the factors necessary for the success of the project as: Having an understanding that the process of creating a growth platform for a company is a long journey Accepting that during a lengthy project such as this, there will be high and low points experienced within the project team and the business, but that the relationship with your partners is crucial to the success of the project. Having the correct team in place will prove to be the “lynch –pin” of any successful project Oracle supported Koen and his team in implementing this project, and is recognised for the role it played during this development in partnership with the company. On his experience with working with the Oracle team, Koen points out that in the critical situations, Oracle was there to ensure that the right people were in place whenever needed and this was key to ensuring the project’s success. Since Oracle is one of the few providers that can offer an enterprise-wide retail platform, our best practice approach is key to connecting interactions throughout the business to enable insight and optimise operations. This is a great example of a large scale international retail project, where the true success of its completion is reflected in how proud the company is about what has been achieved, and the fact that results are already being seen.

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  • Stop Apache serving filetypes

    - by ProfSmiles
    Preferably using .htaccess files, though .conf files are an option, is there any way to stop Apache serving certain filetypes? For example, .db shouldn't be served for obvious reason (privacy and whatnot, etc.), so could I make them show as a 404 but still have them available for my CGI scripts? Putting these sensitive files in a directory other than /public_HTML/ is also an option, though I like having them in the same directory as the scripts for ease of use. Cheers

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  • How to fix black tooltips in Eclipse?

    - by Smotko
    I am having a weird problem with Eclipse documentation tooltips. When I startup Eclipse the tooltip works as expected: But after I press the down button the tooltip turns black: and stays like that for the rest of the session. I am using Eclipse Galileo and Ubuntu 11.04 with the classic desktop. EDIT: I am only experiencing this problem in PHP Development Tools. The tooltips work in Java and Python projects.

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  • How is precedence determined in C pointers?

    - by ankur.trapasiya
    I've come across two pointer declarations that I'm having trouble understanding. My understanding of precedence rules goes something like this: Operator Precedence Associativity (), [ ] 1 Left to Right *, identifier 2 Right to Left Data type 3 But even given this, I can't seem to figure out how to evaluate the following examples correctly: First example float * (* (*ptr)(int))(double **,char c) My evaluation: *(ptr) (int) *(*ptr)(int) *(*(*ptr)(int)) Then, double ** char c Second example unsigned **( * (*ptr) [5] ) (char const *,int *) *(ptr) [5] *(*ptr)[5] *(*(*ptr)[5]) **(*(*ptr)[5]) How should I read them?

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  • The worst anti-patterns you have came across.

    - by ?????????
    What are the worst anti-patterns you have came across in your career as a programmer? I'm mostly involved in java, although it is probably language-independent. I think the worst of it is what I call the main anti-pattern. It means program consisting of single, extremely big class (sometimes accompanied with a pair of little classes) which contains all logic. Typically with a big loop in which all business logic is contained, sometimes having tens of thousands of lines of code.

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  • What is good for Asp.net developer alternative learning Android or Wordpress? [closed]

    - by satinder singh
    I am a .Net developer, having 2 years experience in ASP.net c#, sql, mysql, now my company provide me to learn new technology. They gave me two options ie Android or Wordpress (I know both are totally different things). Also I found Android (Java) syntax little same as in c#, Wordpress also have good advantage in today's market (freelancing). So I want someone to suggest me what to choose either to go for Android or Wordpress?

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  • How to change the menu icon of mate desktop menu applet?

    - by donschoe
    I am using the Mate Desktop Environment v-1.4.1 and having a Mate-Menu applet in the bottom panel: Shutdown [ICON] Applications Places System. See screenshot below. Is there any way to change or remove the [ICON] on the left of the Applications menu? Where does Mate take this from? I noticed the inon changes when using different icon-themes but I don't understand how to customize only this single icon.

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  • Support material - UG Presentation "Using Indexed Views and Computed Columns for Performance"

    - by NeilHambly
    London SQL Server UG Presentation, @ Microsoft Victoria (17 th March 2010). As this was my First UG Presentation I picked a topic and dutifully researched and prepared the PowerPoint Slides & a brief introduction, @ the last minute we needed to change the order of presentations due to small technical hitch with one of the laptops for the first presentation. So having an earlier appearance, meant I conveniently forgot what I had planned (funny that!), so It was a more thinking-on-your-feet kind...(read more)

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  • Efficient SQL Server Indexing by Design

    Having a good set of indexes on your SQL Server database is critical to performance. Efficient indexes don't happen by accident; they are designed to be efficient. Greg Larsen discusses whether primary keys should be clustered, when to use filtered indexes and what to consider when using the Fill Factor.

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